How Do Smart Shopping Campaigns Use Automated Bidding And Placements, And Machine Learning To Show A Variety Of The Most Relevant Ads Across Google Networks To Potential Customers?

• By making suggestions for image styles and context-tested image frames.
• By testing different combinations of text and images.
• By collecting customer review data following site visits.
• By testing different font styles and colors for specific product types.

Answer: C / By collecting customer review data following site visits.